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Real Time Clock Temperature Compensation Circuit and Its Method

A temperature compensation circuit, real-time clock technology, applied in electrical components, power oscillators, etc., to achieve the effect of reducing temperature compensation power consumption and easy to achieve

Active Publication Date: 2015-09-23
HI TREND TECH SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of the present invention found that in the prior art, the low power consumption design mainly focuses on reducing the power consumption of the OSC and the digital counter, while the low power consumption design for the temperature compensation circuit is relatively less

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  • Real Time Clock Temperature Compensation Circuit and Its Method

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Embodiment Construction

[0021] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0023] The first embodiment of the present invention relates to a temperature compensation circuit of a real-time clock. figure 1 It is a structural schematic diagram of the temperature compensation circuit of the real-time clock.

[0024] Specifically, as figure 1 As shown, the temperature compensation circuit of the real-time clock includes a ...

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Abstract

The invention relates to the real-time clock field and discloses a temperature-compensation circuit and a temperature-compensation method of a real-time clock. A memorizer controlled by a power control module is determined to be switched on or off according to a judging result of a comparator; the memorizer switched off is replaced by a register group with a low bit, so that the energy consumption for the temperature compensation of the real-time clock can be reduced. Meanwhile, the temperature-compensation circuit of the real-time clock, as an innovation in designed structure, is easy to realize without relying to any support from specific technology or devices. A temperature sensor can be turned on at a fixed time according to the variation speed of the surrounding temperature, so that the temperature compensation of the real-time clock can be further reduced.

Description

technical field [0001] The invention relates to the field of real-time clocks, in particular to the temperature compensation technology of the real-time clock. Background technique [0002] In the design of a real-time clock (Real-Time Clock, referred to as "RTC"), the frequency of the clock crystal oscillator changes due to temperature changes, resulting in inaccurate counting of the RTC. Therefore, it is necessary to compensate the driving capacitance of the crystal oscillator according to the temperature change. keep the frequency constant. [0003] The temperature compensation RTC generally uses a lookup table (lookup table) method for compensation, that is, the compensation capacitor value is stored in the memory. Since the memory needs to consume a certain amount of power consumption, the power consumption of the RTC compensated in this way will be relatively large. RTC is widely used in battery-powered systems, such as handheld devices, so it needs to be designed for...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/04
Inventor 胡晋萧经华
Owner HI TREND TECH SHANGHAI